import java.util.Scanner;

public class Main {
    public static String toLowerCase(String s) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            if (c >= 'A' && c <= 'Z') {
                c=(char)(c + 32);
            }
            sb.append(c);
        }
        return sb.toString();
    }
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        String str= sc.nextLine();
        sc.close();
        String str1=toLowerCase(str);
        System.out.println(str1);
    }
}
